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Infra-red Observations of Globular Cluster Giants

Published online by Cambridge University Press:  25 April 2016

A.L. Brooke
A.L. Brooke*
Affiliation:
Mount Stromlo Observatory, Australian National University, Canberra
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Extract

This paper presents a progress report on a programme of infra-red photoelectric photometry of the red giant sequences in some southern globular clusters. As measured in B and V these sequences are known to differ from cluster to cluster, at least one contributing factor being differential line-blanketing arising from variations in metal abundance. Observations in R and I should be substantially free of blanketing, and so enable us to eliminate this factor, clarifying the situation and making possible a more accurate transformation of the observations to the Mbol, log Tett plane. The difficulty of making this transformation has been a major obstacle in comparing observations and theory for cluster giants.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 1 , Issue 3 , February 1968 , pp. 83 - 84
Copyright
Copyright © Astronomical Society of Australia 1968

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